{"id":239583,"date":"2022-04-04T13:28:26","date_gmt":"2022-04-04T05:28:26","guid":{"rendered":"https:\/\/www.idc.net\/help\/239583\/"},"modified":"2022-04-04T13:28:26","modified_gmt":"2022-04-04T05:28:26","slug":"%e5%88%86%e5%b8%83%e5%bc%8f%e6%95%b0%e6%8d%ae%e5%ba%93%e6%95%b0%e6%8d%ae%e4%b8%80%e8%87%b4%e6%80%a7%e5%8e%9f%e7%90%86%e8%af%b4%e6%98%8e%e4%b8%8e%e5%ae%9e%e7%8e%b0","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/239583\/","title":{"rendered":"\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u6570\u636e\u4e00\u81f4\u6027\u539f\u7406\u8bf4\u660e\u4e0e\u5b9e\u73b0"},"content":{"rendered":"<h1>\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u6570\u636e\u4e00\u81f4\u6027\u539f\u7406\u8bf4\u660e\u4e0e\u5b9e\u73b0<\/h1>\n<p><span>\u4f5c\u8005\uff1a\u4f5a\u540d<\/span> 2017-10-19 18:37:57<br \/>\n<i><\/i><br \/>\n<span>\u6570\u636e\u5e93<\/span><br \/>\n<i><\/i><br \/>\n<span>\u5927\u6570\u636e<\/span><br \/>\n<i><\/i><br \/>\n<span>\u5206\u5e03\u5f0f<\/span> 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center\"><span>[[206931]]<\/span><\/p>\n<p><strong>\u524d\u8a00<\/strong><\/p>\n<p>\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u7684\u6570\u636e\u4e00\u81f4\u6027\u7ba1\u7406\u662f\u5176\u6700\u91cd\u8981\u7684\u5185\u6838\u6280\u672f\u4e4b\u4e00\uff0c\u4e5f\u662f\u4fdd\u8bc1\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u6ee1\u8db3\u6570\u636e\u5e93\u6700\u57fa\u672c\u7684ACID\u7279\u6027\u4e2d\u7684 \u201c\u4e00\u81f4\u6027\u201d(Consistency)\u7684\u4fdd\u969c\u3002\u5728\u5206\u5e03\u5f0f\u6280\u672f\u53d1\u5c55\u4e0b\uff0c\u6570\u636e\u4e00\u81f4\u6027\u7684\u89e3\u51b3\u65b9\u6cd5\u548c\u6280\u672f\u4e5f\u5728\u4e0d\u65ad\u7684\u6f14\u8fdb\uff0c\u672c\u6587\u5c31\u4ee5\u4f5c\u8005\u5b9e\u9645\u7814\u53d1\u7684\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u4f5c\u4e3a\u6848\u4f8b\uff0c\u4ecb\u7ecd\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u6570\u636e\u4e00\u81f4\u6027\u7684\u539f\u7406\u4ee5\u53ca\u5b9e\u9645\u5b9e\u73b0\u3002<\/p>\n<p><strong>1.\u6570\u636e\u4e00\u81f4\u6027<\/strong><\/p>\n<p><strong>1.1\u6570\u636e\u4e00\u81f4\u6027\u662f\u4ec0\u4e48<\/strong><\/p>\n<p>\u5927\u90e8\u4efd\u4f7f\u7528\u4f20\u7edf\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684DBA\u5728\u770b\u5230\u201c\u6570\u636e\u4e00\u81f4\u6027\u201d\u65f6\uff0c***\u53cd\u5e94\u53ef\u80fd\u90fd\u662f\u6570\u636e\u5728\u8de8\u8868\u4e8b\u52a1\u4e2d\u7684\u6570\u636e\u4e00\u81f4\u6027\u573a\u666f\u3002\u4f46\u662f\u672c\u6587\u4ecb\u7ecd\u7684\u201c\u6570\u636e\u4e00\u81f4\u6027\u201d\uff0c\u6307\u7684\u662f\u201c\u6570\u636e\u5728\u591a\u4efd\u526f\u672c\u4e2d\u5b58\u50a8\u65f6\uff0c\u5982\u4f55\u4fdd\u969c\u6570\u636e\u7684\u4e00\u81f4\u6027\u201d\u573a\u666f\u3002<\/p>\n<p>\u7531\u4e8e\u5728\u5927\u6570\u636e\u9886\u57df\uff0c\u6570\u636e\u7684\u5b89\u5168\u4e0d\u518d\u7531\u786c\u4ef6\u6765\u4fdd\u8bc1\uff0c\u800c\u662f\u901a\u8fc7\u8f6f\u4ef6\u624b\u6bb5\uff0c\u901a\u8fc7\u540c\u65f6\u5c06\u6570\u636e\u5199\u5165\u5230\u591a\u4e2a\u526f\u672c\u4e2d\uff0c\u6765\u786e\u4fdd\u6570\u636e\u7684\u5b89\u5168\u3002\u6570\u636e\u5e93\u5728\u540c\u65f6\u5411\u591a\u4e2a\u526f\u672c\u5199\u5165\u8bb0\u5f55\u65f6\uff0c\u5982\u4f55\u786e\u4fdd\u6bcf\u4e2a\u526f\u672c\u6570\u636e\u4e00\u81f4\uff0c\u79f0\u4e3a\u201c\u6570\u636e\u4e00\u81f4\u6027\u201d\u3002<\/p>\n<p><strong>1.2\u5173\u7cfb\u578b\u6570\u636e\u5e93\u5982\u4f55\u4fdd\u969c\u6570\u636e\u4e00\u81f4\u6027<\/strong><\/p>\n<p>\u4f20\u7edf\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\u5bf9\u4e8e\u8fd0\u884c\u73af\u5883\u2013\u786c\u4ef6\u8981\u6c42\u90fd\u6bd4\u8f83\u9ad8\uff0c\u4f8b\u5982Oracle\u4f1a\u5efa\u8bae\u7528\u6237\u4f7f\u7528\u5c0f\u578b\u673a+\u5171\u4eab\u5b58\u50a8\u4f5c\u4e3a\u6570\u636e\u5e93\u7684\u8fd0\u884c\u73af\u5883\uff0cDB2 DPF\u4e5f\u540c\u6837\u5efa\u8bae\u7528\u6237\u91c7\u7528\u66f4\u597d\u7684\u670d\u52a1\u5668+\u9ad8\u7aef\u5b58\u50a8\u6765\u642d\u5efa\u6570\u636e\u5e93\u7684\u8fd0\u884c\u73af\u5883\u3002\u6240\u4ee5\u5728\u6570\u636e\u5b58\u50a8\u5b89\u5168\u7684\u6280\u672f\u8981\u6c42\u4e0b\uff0c\u4f20\u7edf\u5173\u7cfb\u578b\u6570\u636e\u5e93\u66f4\u591a\u662f\u4f9d\u8d56\u786c\u4ef6\u7684\u6280\u672f\u6765\u4fdd\u969c\u6570\u636e\u7684\u5b89\u5168\u6027\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p>\u56e0\u4e3a\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684\u6570\u636e\u5b89\u5168\u662f\u57fa\u4e8e\u786c\u4ef6\u6765\u4fdd\u969c\uff0c\u5e76\u4e14\u6570\u636e\u4e5f\u4e0d\u4f1a\u901a\u8fc7\u540c\u65f6\u5b58\u50a8\u591a\u4efd\u6765\u4fdd\u969c\u6570\u636e\u7684\u5b89\u5168\uff0c\u6240\u4ee5\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684\u7528\u6237\u9ed8\u8ba4\u8ba4\u4e3a\u6570\u636e\u5b58\u50a8\u662f\u4e00\u81f4\u7684\u3002<\/p>\n<p><strong>1.3\u5206\u5e03\u5f0f\u5b58\u50a8\u5982\u4f55\u4fdd\u969c\u6570\u636e\u4e00\u81f4\u6027<\/strong><\/p>\n<p>\u672c\u6587\u5728\u8ba8\u8bba\u5206\u5e03\u5f0f\u5b58\u50a8\u65f6\uff0c\u4e3b\u8981\u6307\u7684\u662f\u5927\u6570\u636e\u4ea7\u54c1\u4e2d\u7684\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\u548c\u5206\u5e03\u5f0f\u6570\u636e\u5e93\uff0c\u4f8b\u5982\uff1aSequoiaDB\u548cHDFS\u3002<\/p>\n<p>\u7528\u6237\u5728\u641e\u660e\u767d\u5206\u5e03\u5f0f\u5b58\u50a8\u7684\u6570\u636e\u4e00\u81f4\u6027\u539f\u7406\u65f6\uff0c\u5fc5\u987b\u8981\u5148\u660e\u767d\u4e3a\u4ec0\u4e48\u4ed6\u4eec\u5c31\u9700\u8981\u6570\u636e\u4e00\u81f4\u6027\uff0c\u548c\u5206\u5e03\u5f0f\u5b58\u50a8\u7684\u6570\u636e\u5b58\u50a8\u4e0e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684\u6570\u636e\u5b58\u50a8\u53c8\u6709\u4ec0\u4e48\u533a\u522b\u3002<\/p>\n<p>\u5927\u6570\u636e\u6280\u672f\u7684\u8bde\u751f\uff0c\u786e\u786e\u5b9e\u5b9e\u8ba9\u7cfb\u7edf\u7684\u6027\u80fd\u6709\u65b0\u7684\u7a81\u7834\uff0c\u5e76\u4e14\u652f\u6301\u786c\u4ef6\u4ee5\u6c34\u5e73\u6269\u5c55\u7684\u65b9\u5f0f\u6765\u83b7\u5f97\u7ebf\u6027\u589e\u957f\u7684\u6027\u80fd\u548c\u5b58\u50a8\u3002\u8fd9\u4e9b\u90fd\u662f\u8fc7\u53bb\u4f20\u7edf\u5173\u7cfb\u578b\u6570\u636e\u5e93\u6240\u65e0\u6cd5\u63d0\u4f9b\u7684\u3002\u53e6\u5916\uff0c\u5927\u6570\u636e\u6280\u672f\u4e5f\u629b\u5f03\u4e86\u8fd0\u884c\u73af\u5883\u5fc5\u987b\u8db3\u591f\u597d\u7684\u786c\u6027\u8981\u6c42\uff0c\u800c\u662f\u5141\u8bb8\u7528\u6237\u901a\u8fc7\u6279\u91cf\u5ec9\u4ef7X86\u670d\u52a1\u5668+\u672c\u5730\u78c1\u76d8\u7684\u65b9\u5f0f\u642d\u5efa\u89c4\u6a21\u96c6\u7fa4\uff0c\u4ece\u800c\u83b7\u5f97\u6bd4\u8fc7\u53bb\u4f9d\u8d56\u786c\u4ef6\u5782\u76f4\u6269\u5c55\u6240\u63d0\u4f9b\u7684\u66f4\u5f3a\u7684\u8ba1\u7b97\u80fd\u529b\u548c\u66f4\u591a\u7684\u5b58\u50a8\u7a7a\u95f4\u3002<\/p>\n<p>\u5927\u6570\u636e\u6280\u672f\u7684\u6838\u5fc3\u601d\u60f3\u5c31\u662f\u5206\u5e03\u5f0f\uff0c\u5c06\u4e00\u4e2a\u5927\u7684\u5de5\u4f5c\u4efb\u52a1\u5206\u89e3\u6210\u591a\u4e2a\u5c0f\u4efb\u52a1\uff0c\u7136\u540e\u901a\u8fc7\u5206\u5e03\u5f0f\u5e76\u53d1\u64cd\u4f5c\u7684\u65b9\u5f0f\u5c06\u5176\u5b8c\u6210\uff0c\u4ece\u800c\u63d0\u9ad8\u6574\u4e2a\u7cfb\u7edf\u7684\u8ba1\u7b97\u6548\u7387\u6216\u8005\u662f\u5b58\u50a8\u80fd\u529b\u3002\u800c\u5728\u5206\u5e03\u5f0f\u73af\u5883\u4e0b\uff0c\u7531\u4e8e\u786c\u4ef6\u7684\u8981\u6c42\u964d\u4f4e\uff0c\u5fc5\u7136\u9700\u8981\u5927\u6570\u636e\u4ea7\u54c1\u63d0\u4f9b\u53e6\u5916\u4e00\u4e2a\u91cd\u8981\u7684\u529f\u80fd\u2013\u6570\u636e\u5b89\u5168\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p>\u5927\u6570\u636e\u4ea7\u54c1\u5728\u89e3\u51b3\u6570\u636e\u5b89\u5168\u7684\u65b9\u5f0f\u4e0a\uff0c\u90fd\u6bd4\u8f83\u63a5\u8fd1\uff0c\u7b80\u5355\u6765\u8bf4\uff0c\u5c31\u662f\u8ba9\u4e00\u4efd\u6570\u636e\u901a\u8fc7\u5f02\u6b65\u6216\u8005\u540c\u6b65\u7684\u65b9\u5f0f\u4fdd\u5b58\u5728\u591a\u53f0\u673a\u5668\u4e0a\uff0c\u4ece\u800c\u4fdd\u969c\u6570\u636e\u7684\u5b89\u5168\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5206\u5e03\u5f0f\u5b58\u50a8\u5728\u89e3\u51b3\u6570\u636e\u5b89\u5168\u7684\u6280\u672f\u96be\u70b9\u540e\uff0c\u53c8\u5f15\u5165\u4e86\u4e00\u4e2a\u65b0\u7684\u6280\u672f\u95ee\u9898\uff0c\u5c31\u662f\u5982\u4f55\u4fdd\u969c\u591a\u4e2a\u526f\u672c\u4e2d\u7684\u6570\u636e\u4e00\u81f4\u6027\u3002\u76ee\u524dSequoiaDB\u662f\u4f7f\u7528Raft\u7b97\u6cd5\u6765\u4fdd\u8bc1\u6570\u636e\u5728\u591a\u4e2a\u526f\u672c\u4e2d\u4e00\u81f4\u6027\u3002<\/p>\n<p><strong>2.Raft\u7b97\u6cd5<\/strong><\/p>\n<p><strong>2.1Raft\u7b97\u6cd5\u80cc\u666f<\/strong><\/p>\n<p>\u5728\u5206\u5e03\u5f0f\u73af\u5883\u4e0b\uff0c***\u7684\u4e00\u81f4\u6027\u7b97\u6cd5\u5e94\u8be5\u662fPaxos\u7b97\u6cd5\uff0c\u4f46\u662f\u7531\u4e8e\u5b83\u5b9e\u5728\u8fc7\u4e8e\u6666\u6da9\u96be\u61c2\uff0c\u5e76\u4e14\u5b9e\u73b0\u8d77\u6765\u6781\u5ea6\u56f0\u96be\uff0c\u6240\u4ee5\u57282013\u5e74\uff0cDiego Ongaro\u3001John Ousterhout\u4e24\u4e2a\u4eba\u4ee5\u6613\u61c2(Understandability)\u4e3a\u76ee\u6807\u8bbe\u8ba1\u4e86\u4e00\u5957\u4e00\u81f4\u6027\u7b97\u6cd5Raft\u3002Raft\u7b97\u6cd5***\u7684\u7279\u70b9\u5728\u4e8e\u7b80\u5355\u6613\u61c2\uff0c\u5e76\u4e14\u5b9e\u73b0\u8d77\u6765\u7b80\u5355<\/p>\n<p><strong>2.2Raft\u7b97\u6cd5\u6982\u8ff0<\/strong><\/p>\n<p>\u4e0ePaxos\u4e0d\u540c\uff0cRaft\u5f3a\u8c03\u7684\u662f\u6613\u61c2\uff0cRaft\u548cPaxos\u4e00\u6837\u53ea\u8981\u4fdd\u8bc1n\/2+1\u8282\u70b9\u6b63\u5e38\u5c31\u80fd\u591f\u63d0\u4f9b\u670d\u52a1\u3002<\/p>\n<p>\u4f17\u6240\u5468\u77e5\u5f53\u95ee\u9898\u8f83\u4e3a\u590d\u6742\u65f6\u53ef\u4ee5\u628a\u95ee\u9898\u5206\u89e3\u4e3a\u51e0\u4e2a\u5c0f\u95ee\u9898\u6765\u5904\u7406\uff0cRaft\u4e5f\u4f7f\u7528\u4e86\u5206\u800c\u6cbb\u4e4b\u7684\u601d\u60f3\u3002Raft\u7b97\u6cd5\u91cd\u70b9\u89e3\u51b3\u4e09\u4e2a\u5b50\u95ee\u9898\uff1a\u9009\u4e3e(Leader election)\u3001\u65e5\u5fd7\u590d\u5236(Log replication)\u3001\u5b89\u5168\u6027(Safety)\u3002<\/p>\n<p>Raft\u7b97\u6cd5\u5f3a\u5316\u4e86Leader\u8282\u70b9\u7684\u529f\u80fd\uff0cFollower\u8282\u70b9\u7684\u6570\u636e\u53ea\u80fd\u591f\u4eceLeader\u4e2d\u83b7\u53d6\uff0c\u6240\u4ee5Follower\u8282\u70b9\u7684\u5b9e\u73b0\u5c31\u53d8\u5f97\u7b80\u5355\uff0c\u53ea\u8981\u8d1f\u8d23\u548cLeader\u4fdd\u6301\u901a\u4fe1\uff0c\u5e76\u4e14\u63a5\u53d7Leader\u63a8\u9001\u7684\u6570\u636e\u5373\u53ef\u3002<\/p>\n<p><strong>2.3Raft\u7b97\u6cd5\u539f\u7406<\/strong><\/p>\n<p>2.3.1 \u8282\u70b9\u89d2\u8272<\/p>\n<p>Raft\u7b97\u6cd5\u4e2d\uff0c\u5bf9\u8282\u70b9\u7684\u72b6\u6001\u5206\u4e3a3\u79cd\u89d2\u8272\uff0c\u5206\u522b\u662fLeader(***)\u3001Follower(\u8ffd\u968f\u8005)\u548cCandidate(\u5019\u9009\u8005)\u3002<\/p>\n<p>Leader\uff0c\u8d1f\u8d23\u5904\u7406\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\uff0c\u8d1f\u8d23\u5c06\u65e5\u5fd7\u540c\u6b65\u5230Follower\u4e2d\uff0c\u5e76\u4e14\u4fdd\u8bc1\u4e0eFollower\u4e4b\u95f4\u7684heartBeat\u8054\u7cfb;<\/p>\n<p>Follower\uff0c\u5f53\u96c6\u7fa4\u521a\u521a\u542f\u52a8\u65f6\uff0c\u6240\u6709\u8282\u70b9\u5747\u4e3aFollower\u72b6\u6001\uff0c\u5b83\u7684\u5de5\u4f5c\u4e3b\u8981\u4e3a\u54cd\u5e94Leader\u7684\u65e5\u5fd7\u540c\u6b65\u8bf7\u6c42\uff0c\u54cd\u5e94Candidate\u7684\u8bf7\u6c42\uff0c\u4ee5\u53ca\u628a\u8bf7\u6c42\u5230Follower\u7684\u4e8b\u52a1\u8bf7\u6c42\u8f6c\u53d1\u7ed9Leader;<\/p>\n<p>Candidate\uff0c\u9009\u4e3eLeader\u65f6\u8d1f\u8d23\u6295\u7968\uff0c\u9009\u4e3e\u51fa\u6765Leader\u540e\uff0c\u8282\u70b9\u5c06\u4eceCandidate\u72b6\u6001\u53d8\u4e3aLeader\u72b6\u6001\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p>2.3.2 Terms<\/p>\n<p>\u5728\u5206\u5e03\u5f0f\u73af\u5883\u4e0b\uff0c\u201c\u65f6\u95f4\u540c\u6b65\u201d\u4e00\u76f4\u90fd\u662f\u8001\u5927\u96be\u7684\u6280\u672f\u96be\u9898\u3002Raft\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u5c06\u65f6\u95f4\u5212\u5206\u4e3a\u4e00\u4e2a\u4e00\u4e2a\u7684Term(\u53ef\u4ee5\u7406\u89e3\u4e3a\u201c\u903b\u8f91\u65f6\u95f4\u201d)\u6765\u5904\u7406\u5728\u4e0d\u540c\u65f6\u95f4\u6bb5\u91cc\u7684\u6570\u636e\u4e00\u81f4\u6027\u3002<\/p>\n<p>Terms\u6709\u4ee5\u4e0b\u539f\u5219<\/p>\n<ul>\n<li>\u6bcf\u4e2aTerm\u4e2d\uff0c\u81f3\u591a\u5b58\u5728\u4e00\u4e2aLeader<\/li>\n<li>\u67d0\u4e9bTerm\u4e2d\uff0c\u6709\u53ef\u80fd\u5b58\u5728\u7531\u4e8e\u9009\u4e3e\u5931\u8d25\uff0c\u6ca1\u6709Leader\u7684\u60c5\u51b5<\/li>\n<li>\u6bcf\u4e2a\u8282\u70b9\u81ea\u5df1\u7ef4\u62a4\u672c\u5730\u7684currentTerm<\/li>\n<li>\u6bcf\u4e2aTerm\u90fd\u662f\u4e00\u4e2a\u8fde\u7eed\u9012\u589e\u7684\u7f16\u53f7<\/li>\n<li>\u5982\u679cFollower\u7684Term\u7f16\u53f7\u6bd4\u522b\u7684Follower Term\u7f16\u53f7\u5c0f\u65f6\uff0c\u8be5Follower Term\u7f16\u53f7\u5c06\u66f4\u65b0Term\u7f16\u53f7\uff0c\u4ee5\u4fdd\u6301\u4e0e\u5176\u4ed6Follower Term\u7f16\u53f7\u4e00\u81f4<\/li>\n<\/ul>\n<p>2.3.3 \u9009\u4e3e<\/p>\n<p>Raft\u7684\u9009\u4e3e\u7531\u5b9a\u65f6\u5668\u89e6\u53d1\uff0c\u6bcf\u4e2a\u8282\u70b9\u7684\u89e6\u53d1\u65f6\u95f4\u90fd\u4e0d\u76f8\u540c\u3002<\/p>\n<p>\u6240\u6709\u7684\u8282\u70b9\u5728\u5f00\u59cb\u65f6\u72b6\u6001\u90fd\u4e3aFollower\uff0c\u5f53\u5b9a\u65f6\u5668\u89e6\u53d1\u9009\u4e3e\u540eTerm\u7f16\u53f7\u9012\u589e\uff0c\u8be5\u8282\u70b9\u7684\u72b6\u6001\u7531Follower\u8f6c\u4e3aCandidate\uff0c\u5e76\u4e14\u5411\u5176\u4ed6\u8282\u70b9\u53d1\u8d77RequestVote RPC\u8bf7\u6c42\uff0c\u8fd9\u65f6\u9009\u4e3e\u67093\u79cd\u60c5\u51b5\u53ef\u80fd\u53d1\u751f\uff1a<\/p>\n<p>\u53d1\u8d77RequestVote\u7684\u8282\u70b9\u6536\u5230n\/2+1(\u8fc7\u534a\u6570)\u4e2a\u8282\u70b9\u7684\u6295\u7968\uff0c\u8be5\u8282\u70b9\u5c06\u4eceCandidate\u72b6\u6001\u53d8\u4e3aLeader\u72b6\u6001\uff0c\u5f00\u59cb\u5411\u5176\u4ed6\u8282\u70b9\u53d1\u9001HeartBeat\u4ee5\u4fdd\u6301Leader\u7684\u6b63\u5e38\u72b6\u6001<\/p>\n<p>\u5982\u679c\u6536\u5230\u6295\u7968\u8bf7\u6c42\u540e\uff0c\u8be5\u8282\u70b9\u53d1\u73b0\u53d1\u8d77\u6295\u7968\u7684\u8282\u70b9Term\u5927\u4e8e\u81ea\u5df1\uff0c\u5219\u8be5\u8282\u70b9\u72b6\u6001\u4eceCandidate\u8f6c\u4e3aFollower\uff0c\u5426\u5219\u4fdd\u6301Candidate\u72b6\u6001\uff0c\u5e76\u4e14\u62d2\u7edd\u8be5\u6295\u7968\u8bf7\u6c42<\/p>\n<p>\u9009\u4e3e\u671f\u95f4\u53d1\u751f\u4e86\u8d85\u65f6\uff0c\u5219Term\u7f16\u53f7\u9012\u589e\uff0c\u91cd\u65b0\u53d1\u8d77\u9009\u4e3e<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p>2.3.4 \u65e5\u5fd7\u590d\u5236<\/p>\n<p>\u65e5\u5fd7\u590d\u5236\u4e3b\u8981\u7684\u4f5c\u7528\u5c31\u662f\u7528\u6765\u4fdd\u8bc1\u8282\u70b9\u7684\u6570\u636e\u4e00\u81f4\u6027\u4e0e\u9ad8\u53ef\u7528\u6027\u3002<\/p>\n<p>\u5f53Leader\u88ab\u9009\u4e3e\u51fa\u6765\u540e\uff0c\u6240\u6709\u7684\u4e8b\u52a1\u64cd\u4f5c\u90fd\u5fc5\u987b\u8981\u7ecf\u8fc7Leader\u5904\u7406\u3002\u8fd9\u4e9b\u4e8b\u52a1\u64cd\u4f5c\u6210\u529f\u540e\uff0c\u5c06\u4f1a\u88ab\u6309\u987a\u5e8f\u5199\u5165\u5230LOG\u4e2d\uff0c\u6bcf\u4e2aLOG\u90fd\u5305\u542b\u4e00\u4e2aindex\u7f16\u53f7\u3002<\/p>\n<p>Leader\u5728LOG\u53d1\u751f\u53d8\u5316\u540e\uff0c\u901a\u8fc7HeartBeat\u5c06\u65b0\u7684LOG\u540c\u6b65\u5230Follower\u4e0a\uff0cFollower\u5728\u63a5\u6536\u5230LOG\u540e\uff0c\u518d\u5411Leader\u53d1\u9001ACK\u4fe1\u606f\uff0c\u5f53Leader\u63a5\u5230\u5927\u591a\u6570(2\/n+1)Follower\u7684ACK\u4fe1\u606f\u540e\uff0c\u5c06\u8be5LOG\u8bbe\u7f6e\u4e3a\u5df2\u63d0\u4ea4\uff0c\u5e76\u4e14Leader\u5c06LOG\u8ffd\u52a0\u5230\u672c\u5730\u78c1\u76d8\u4e2d\u3002<\/p>\n<p>\u540c\u65f6Leader\u5c06\u5728\u4e0b\u4e00\u4e2aHeartBeat\u4e2d\uff0c\u901a\u77e5\u6240\u6709\u7684Follower\u5c06\u8be5LOG\u5b58\u50a8\u5728\u5404\u81ea\u7684\u672c\u5730\u78c1\u76d8\u4e2d\u3002<\/p>\n<p>2.3.5 \u5b89\u5168\u6027<\/p>\n<p>\u5b89\u5168\u6027\u662f\u7528\u4e8e\u786e\u4fdd\u6bcf\u4e2a\u8282\u70b9\u90fd\u662f\u6309\u7167\u76f8\u540c\u7684\u65e5\u5fd7\u5e8f\u5217\u8fdb\u884c\u6267\u884c\u7684\u5b89\u5168\u673a\u5236\u3002<\/p>\n<p>\u5982\u679c\u5f53\u67d0\u4e2aFollower\u5728\u540c\u6b65Leader\u7684\u65e5\u5fd7\u65f6\u5931\u8d25\uff0c\u4f46\u662f\u672a\u6765\u8be5Follower\u53c8\u53ef\u80fd\u88ab\u9009\u4e3e\u4e3aLeader\u65f6\uff0c\u5c31\u6709\u53ef\u80fd\u5bfc\u81f4\u524d\u4e00\u4e2aLeader\u5df2\u7ecfcommit\u7684\u65e5\u5fd7\u53d1\u751f\u8986\u76d6\uff0c\u8fd9\u6837\u5c31\u5bfc\u81f4\u4e86\u8282\u70b9\u6267\u884c\u4e0d\u540c\u5e8f\u5217\u7684\u65e5\u5fd7\u3002<\/p>\n<p>Raft\u7684\u5b89\u5168\u6027\u5c31\u662f\u7528\u4e8e\u4fdd\u8bc1\u9009\u4e3e\u51fa\u6765\u7684Leader\u4e00\u5b9a\u5305\u542b\u5148\u524d\u5df2\u7ecfcommit LOG \u7684\u673a\u5236\uff0c\u4e3b\u8981\u9075\u5faa\u7684\u539f\u5219\u5982\u4e0b\uff1a<\/p>\n<p>\u6bcf\u4e2aTerm \u53ea\u80fd\u9009\u4e3e\u4e00\u4e2aLeader;<\/p>\n<p>Leader\u7684\u65e5\u5fd7\u5b8c\u6574\u6027\uff0c\u5219\u5f53Candidate\u91cd\u65b0\u9009\u4e3eLeader\u65f6\uff0c\u65b0\u7684Leader\u5fc5\u987b\u8981\u5305\u542b\u5148\u524d\u5df2\u7ecfcommit\u7684LOG;<\/p>\n<p>Candidate\u5728\u9009\u4e3e\u65b0\u7684Leader\u65f6\uff0c\u4f7f\u7528Term\u6765\u4fdd\u8bc1LOG\u7684\u5b8c\u6574\u6027;<\/p>\n<p><strong>3.\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u6570\u636e\u4e00\u81f4\u6027\u6280\u672f\u5b9e\u73b0<\/strong><\/p>\n<p>\u4ee5\u56fd\u4ea7\u539f\u5382\u7684\u5206\u5e03\u5f0f\u6570\u636e\u5e93SequoiaDB\u4e3a\u4f8b\uff0cSequoiaDB\u5728\u591a\u526f\u672c\u7684\u90e8\u7f72\u4e2d\uff0c\u91c7\u7528Raft\u7b97\u6cd5\u4fdd\u8bc1\u6570\u636e\u5728\u591a\u526f\u672c\u73af\u5883\u4e2d\u4fdd\u6301\u4e00\u81f4\u3002<\/p>\n<p>SequoiaDB\u96c6\u7fa4\u4e2d\uff0c\u603b\u5171\u5305\u542b3\u4e2d\u89d2\u8272\u8282\u70b9\uff0c\u5206\u522b\u662f\u534f\u8c03\u8282\u70b9\u3001\u7f16\u76ee\u8282\u70b9\u548c\u6570\u636e\u8282\u70b9\u3002\u7531\u4e8e\u534f\u8c03\u8282\u70b9\u672c\u8eab\u4e0d\u5b58\u4efb\u4f55\u6570\u636e\uff0c\u6240\u4ee5\u53ea\u6709\u7f16\u76ee\u8282\u70b9\u548c\u6570\u636e\u8282\u70b9\u5b58\u5728\u4e8b\u52a1\u64cd\u4f5c\uff0c\u6362\u8a00\u4e4b\uff0c\u7f16\u76ee\u5206\u533a\u7ec4\u548c\u6570\u636e\u5206\u533a\u7ec4\u7684\u526f\u672c\u540c\u6b65\u91c7\u7528Raft\u7b97\u6cd5\u4fdd\u8bc1\u6570\u636e\u4e00\u81f4\u6027\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p><strong>3.1\u7f16\u76ee\u8282\u70b9\u548c\u6570\u636e\u8282\u70b9\u7684\u4e8b\u52a1\u65e5\u5fd7\u4ecb\u7ecd<\/strong><\/p>\n<p>\u7f16\u76ee\u8282\u70b9\u548c\u6570\u636e\u8282\u70b9\u7531\u4e8e\u90fd\u662f\u9700\u8981\u5b58\u50a8\u6570\u636e\u7684\uff0c\u5e76\u4e14\u5728\u96c6\u7fa4\u90e8\u7f72\u4e2d\u8be5\uff0c\u4e3a\u4e86\u786e\u4fdd\u6570\u636e\u7684\u5b89\u5168\uff0c\u90fd\u662f\u5efa\u8bae\u91c7\u7528\u5206\u5e03\u5f0f\u7684\u65b9\u5f0f\u8fdb\u884c\u90e8\u7f72\uff0c\u6240\u4ee5\u5728\u6570\u636e\u540c\u6b65\u4e2d\uff0c\u9700\u8981\u91c7\u7528Raft\u7b97\u6cd5\u7684\u57fa\u672c\u539f\u7406\u8fdb\u884c\u6570\u636e\u540c\u6b65\u3002<\/p>\n<p>\u7f16\u76ee\u8282\u70b9\u548c\u6570\u636e\u8282\u70b9\u5728\u5b58\u50a8\u6570\u636e\u65f6\uff0c\u5171\u5305\u542b\u4e24\u5927\u90e8\u5206\uff0c\u4e00\u4e2a\u771f\u5b9e\u7684\u6570\u636e\u6587\u4ef6\uff0c\u53e6\u4e00\u4e2a\u662f\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p>SequoiaDB\u7684\u8282\u70b9\u4e8b\u52a1\u65e5\u5fd7\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u753120\u4e2a64MB(\u603b\u5927\u5c0f\u4e3a1.25GB)\u7684\u6587\u4ef6\u6784\u6210\u3002\u8282\u70b9\u7684\u4e8b\u52a1\u65e5\u5fd7\u4e3b\u8981\u5305\u542b\u4e00\u4e2aindex\u7f16\u53f7\u548c\u6570\u636e\u64cd\u4f5c\u5185\u5bb9\uff0cindex\u7f16\u53f7\u4fdd\u6301\u6c38\u8fdc\u9012\u589e\u72b6\u6001\u3002<\/p>\n<p>\u53e6\u5916\uff0cSequoiaDB\u8282\u70b9\u7684\u4e8b\u52a1\u65e5\u5fd7\u4e0d\u4f1a***\u4fdd\u5b58\uff0c\u800c\u662f\u5f53\u6240\u6709\u7684\u4e8b\u52a1\u65e5\u5fd7\u5199\u6ee1\u540e\uff0c\u518d\u91cd\u65b0\u4ece***\u4e2a\u6587\u4ef6\u5f00\u59cb\u8fdb\u884c\u8986\u76d6\u5199\u5165\u3002<\/p>\n<p><strong>3.2\u7f16\u76ee\u5206\u533a\u7ec4\u7684\u6570\u636e\u4e00\u81f4\u6027<\/strong><\/p>\n<p>\u7531\u4e8e\u7f16\u76ee\u5206\u533a\u7ec4\u662f\u4fdd\u5b58SequoiaDB\u96c6\u7fa4\u7684\u5143\u4fe1\u606f\uff0c\u6570\u636e\u540c\u6b65\u8981\u6c42\u9ad8\uff0c\u6240\u4ee5\u7f16\u76ee\u5206\u533a\u7ec4\u7684\u6570\u636e\u4e00\u81f4\u6027\u8981\u6c42\u4e3a\u5f3a\u4e00\u81f4\u6027\uff0c\u5373\u6bcf\u6b21\u5411\u7f16\u76ee\u5206\u533a\u7ec4\u6267\u884c\u4e8b\u52a1\u64cd\u4f5c\u65f6\uff0c\u5fc5\u987b\u8981\u786e\u4fdd\u6240\u6709\u7684\u7f16\u76ee\u8282\u70b9\u64cd\u4f5c\u6210\u529f\uff0c\u624d\u8ba1\u7b97\u8be5\u64cd\u4f5c\u6267\u884c\u6210\u529f\uff0c\u5426\u5219\u8be5\u4e8b\u52a1\u64cd\u4f5c\u5c06\u5728\u6574\u4e2a\u7f16\u76ee\u5206\u533a\u7ec4\u4e2d\u56de\u9000\u4e8b\u52a1\u65e5\u5fd7\uff0c\u4ee5\u4fdd\u8bc1\u5206\u533a\u7ec4\u5185\u7684\u6570\u636e\u4e00\u81f4\u6027\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u7f16\u76ee\u5206\u533a\u7ec4\u8fd8\u6709\u4e00\u4e2a\u6bd4\u8f83\u91cd\u8981\u7684\u7279\u6027\uff0c\u5373\u7f16\u76ee\u5206\u533a\u7ec4\u5fc5\u987b\u8981\u5b58\u5728\u4e3b\u8282\u70b9\u624d\u80fd\u591f\u6b63\u5e38\u5de5\u4f5c\uff0c\u5982\u679c\u8001\u7684\u4e3b\u8282\u70b9\u5b95\u673a\u4e86\uff0c\u7f16\u76ee\u5206\u533a\u7ec4\u6682\u65f6\u6ca1\u6709\u4e3b\u8282\u70b9\uff0c\u5219\u8be5\u7f16\u76ee\u5206\u533a\u7ec4\u4e0d\u80fd\u591f\u5bf9\u5916\u63d0\u4f9b\u4efb\u4f55\u4e8b\u52a1\u64cd\u4f5c\u548c\u6570\u636e\u67e5\u8be2\u64cd\u4f5c\u3002<\/p>\n<p><strong>3.3\u6570\u636e\u5206\u533a\u7ec4\u7684\u6570\u636e\u4e00\u81f4\u6027<\/strong><\/p>\n<p>\u6570\u636e\u5206\u533a\u7ec4\u7684\u6570\u636e\u4e00\u81f4\u6027\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4e3a\u6700\u7ec8\u4e00\u81f4\u6027\u6027\uff0c\u5373\u53ea\u8981\u6c42\u4e3b\u8282\u70b9\u6267\u884c\u4e8b\u52a1\u64cd\u4f5c\u6210\u529f\u5373\u89c6\u4e3a\u64cd\u4f5c\u6210\u529f\uff0c\u4e3b\u8282\u70b9\u5c06\u5728\u672a\u6765\u5f02\u6b65\u540c\u6b65ReplicaLOG\u5230\u4ece\u8282\u70b9\u4e0a\u3002<\/p>\n<p><strong>3.4\u4e3b\u4ece\u8282\u70b9\u7684\u4e8b\u52a1\u65e5\u5fd7\u540c\u6b65<\/strong><\/p>\n<p>SequoiaDB\u7684\u4e3b\u4ece\u8282\u70b9\u662f\u901a\u8fc7\u4e8b\u52a1\u65e5\u5fd7\u540c\u6b65\u6765\u4fdd\u8bc1\u6570\u636e\u4e00\u81f4\u6027\u7684\uff0c\u5e76\u4e14\u4e3b\u4ece\u8282\u70b9\u7684\u4e8b\u52a1\u65e5\u5fd7\u540c\u6b65\u662f\u5355\u7ebf\u7a0b\u5b8c\u6210\u3002<\/p>\n<p>\u5982\u679c\u5f53\u4e3b\u8282\u70b9\u548c\u4ece\u8282\u70b9\u7684LSN\u5dee\u8ddd\u4e3a\u4e00\u6761\u8bb0\u5f55\uff0c\u5219\u4e3b\u8282\u70b9\u4f1a\u4e3b\u52a8\u5c06***\u7684\u4e8b\u52a1\u65e5\u5fd7\u63a8\u9001\u7ed9\u4ece\u8282\u70b9\u3002<\/p>\n<p>\u5982\u679c\u4e3b\u8282\u70b9\u548c\u4ece\u8282\u70b9\u7684LSN\u5dee\u8ddd\u8d85\u8fc7\u4e00\u6761\u8bb0\u5f55\uff0c\u5219\u4ece\u8282\u70b9\u4f1a\u4e3b\u52a8\u5411\u4e3b\u8282\u70b9\u8bf7\u6c42\u540c\u6b65\u4e8b\u52a1\u65e5\u5fd7\uff0c\u4e3b\u8282\u70b9\u6536\u5230\u540c\u6b65\u8bf7\u6c42\u540e\uff0c\u4f1a\u5c06\u4ece\u8282\u70b9\u7684LSN\u53f7\u5230\u4e3b\u8282\u70b9***\u7684LSN\u53f7\u5bf9\u5e94\u7684\u4e8b\u52a1\u65e5\u5fd7\u6253\u5305\u4e00\u6b21\u6027\u53d1\u9001\u7ed9\u4ece\u8282\u70b9\u3002<\/p>\n<p><strong>3.5\u4ece\u8282\u70b9\u65e5\u5fd7\u91cd\u653e<\/strong><\/p>\n<p>\u5f53\u4ece\u8282\u70b9\u83b7\u53d6\u5230\u4e3b\u8282\u70b9\u63a8\u9001\u8fc7\u6765\u7684\u4e8b\u52a1\u65e5\u5fd7\u540e\uff0c\u5c31\u4f1a\u81ea\u52a8\u89e3\u6790\u4e8b\u52a1\u65e5\u5fd7\u548c\u91cd\u653e\u3002\u4ece\u8282\u70b9\u5728\u91cd\u653e\u4e8b\u52a1\u65e5\u5fd7\u65f6\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4f1a\u4ee510\u5e76\u53d1\u6765\u91cd\u653e\u4e8b\u52a1\u65e5\u5fd7\u3002<\/p>\n<p>\u4ece\u8282\u70b9\u5728\u6267\u884c\u5e76\u53d1\u91cd\u653e\u65e5\u5fd7\u65f6\u6709\u6761\u4ef6\u9650\u5236\uff0c\u5373\u5728\u96c6\u5408\u7684\u552f\u4e00\u7d22\u5f15\u4e2a\u6570&lt;=1\u7684\u60c5\u51b5\u4e0b\uff0cINSERT\u3001DELETE\u3001UPDATE\u3001LOB WRITE\u3001LOBUPDATE\u3001LOB REMOVE\u64cd\u4f5c\u53ef\u4ee5\u652f\u6301\u5e76\u53d1\u91cd\u653e\u4e8b\u52a1\u65e5\u5fd7\u3002\u4ece\u8282\u70b9\u5728\u505a\u5e76\u53d1\u91cd\u653e\u65f6\uff0c\u662f\u901a\u8fc7\u8bb0\u5f55\u7684OID\u8fdb\u884c\u6253\u6563\u5e76\u53d1\u6267\u884c\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u4fdd\u8bc1\u5bf9\u76f8\u540c\u8bb0\u5f55\u7684\u64cd\u4f5c\u4e0d\u4f1a\u7531\u4e8e\u5e76\u53d1\u91cd\u653e\u5bfc\u81f4\u6570\u636e\u4e0d\u4e00\u81f4\u3002<\/p>\n<p>\u4f46\u662f\u7528\u6237\u9700\u8981\u6ce8\u610f\uff0c\u4ece\u8282\u70b9\u5728\u91cd\u653e\u4e8b\u52a1\u65e5\u5fd7\u65f6\uff0c DROP CL\u64cd\u4f5c\u4e0d\u80fd\u591f\u652f\u6301\u5e76\u53d1\u91cd\u653e\u3002<\/p>\n<p><strong>4.SequoiaDB\u6570\u636e\u4e00\u81f4\u6027\u5e94\u7528<\/strong><\/p>\n<p>\u76ee\u524dSequoiaDB\u6570\u636e\u5206\u533a\u7ec4\u7684\u6570\u636e\u4e00\u81f4\u6027\u662f\u57fa\u4e8e\u96c6\u5408\u7ea7\u522b\u8fdb\u884c\u914d\u7f6e\u7684\u3002\u7528\u6237\u5728\u4f7f\u7528SequoiaDB\u8fc7\u7a0b\u4e2d\uff0c\u53ef\u4ee5\u968f\u65f6\u8c03\u6574\u6570\u636e\u4e00\u81f4\u6027\u7684\u5f3a\u5ea6\u3002<\/p>\n<p><strong>4.1 \u521b\u5efa\u96c6\u5408\u65f6\u6307\u5b9a<\/strong><\/p>\n<p>\u5728\u4e00\u4e2a\u591a\u526f\u672c\u7684SequoiaDB\u96c6\u7fa4\u4e2d\uff0c\u96c6\u5408\u9ed8\u8ba4\u7684\u6570\u636e\u4e00\u81f4\u6027\u884c\u7ea7\u522b\u4e3a\u201c\u6700\u7ec8\u4e00\u81f4\u6027\u201d\u3002\u7528\u6237\u53ef\u4ee5\u5728\u521b\u5efa\u96c6\u5408\u65f6\u663e\u5f0f\u6307\u5b9a\u8be5\u96c6\u5408\u7684\u201c\u6570\u636e\u4e00\u81f4\u6027\u5f3a\u5ea6\u201d\uff0c\u4f8b\u5982\u53ef\u4ee5\u5728SequoiaDB Shell\u4e2d\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4<\/p>\n<p>db.CSNAME.createCL(\u201cCLNAME\u201d,{ReplSize:3})<\/p>\n<p>ReplSize\u53c2\u6570\u586b\u5199\u8303\u56f4<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p><strong>4.2 \u4fee\u6539\u5df2\u7ecf\u5b58\u5728\u7684\u96c6\u5408<\/strong><\/p>\n<p>\u5982\u679c\u96c6\u5408\u5728\u521b\u5efa\u65f6\u6ca1\u6709\u8bbe\u7f6e\u201c\u6570\u636e\u4e00\u81f4\u6027\u201dReplSize\u53c2\u6570\uff0c\u7528\u6237\u4e5f\u53ef\u4ee5\u5bf9\u5df2\u7ecf\u5b58\u5728\u7684\u96c6\u5408\u8fdb\u884c\u4fee\u6539\uff0c\u5728SequoiaDB Shell\u4fee\u6539\u547d\u4ee4\u5982\u4e0b<\/p>\n<p>db.CSNAME.CLNAME.alter({ReplSize:3})<\/p>\n<p>ReplSize\u7684\u53d6\u503c\u8303\u56f4\u548c\u521b\u5efa\u96c6\u5408\u65f6\u4e00\u81f4\u3002<\/p>\n<p><strong>4.3 \u5982\u4f55\u67e5\u770b\u96c6\u5408\u7684ReplSize\u53c2\u6570<\/strong><\/p>\n<p>\u5982\u679c\u7528\u6237\u5e0c\u671b\u68c0\u67e5\u5f53\u524d\u96c6\u5408\u7684RepliSize\u53c2\u6570\u503c\uff0c\u53ef\u4ee5\u901a\u8fc7\u6570\u636e\u5e93\u5feb\u7167\u8fdb\u884c\u67e5\u770b\uff0c\u5728SequoiaDB Shell\u67e5\u770b\u547d\u4ee4\u5982\u4e0b<\/p>\n<pre>\n  \n \n \n <ol>\n   \n  \n  \n  <li><span><span>db.snapshot(SDB_SNAP_CATALOG,{},&nbsp;{<\/span><span>\"Name\"<\/span><span>:<\/span><span>null<\/span><span>,&nbsp;<\/span><span>\"IsMainCL\"<\/span><span>:<\/span><span>null<\/span><span>,<\/span><span>\"MainCLName\"<\/span><span>:<\/span><span>null<\/span><span>,&nbsp;<\/span><span>\"ReplSize\"<\/span><span>:<\/span><span>null<\/span><span>})&nbsp;<\/span><\/span><\/li>\n  \n \n \n <\/ol><\/pre>\n<p>\u6253\u5370\u4fe1\u606f\u5982\u4e0b<\/p>\n<pre>\n  \n \n \n <ol>\n   \n  \n  \n  <li><span><span>{&nbsp;<\/span><\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span><span>\"MainCLName\"<\/span><span>:<\/span><span>\"test.main2\"<\/span><span>,&nbsp;<\/span><\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span><span>\"Name\"<\/span><span>:&nbsp;<\/span><span>\"foo.bar2\"<\/span><span>,&nbsp;<\/span><\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span><span>\"IsMainCL\"<\/span><span>:&nbsp;<\/span><span>null<\/span><span>,&nbsp;<\/span><\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span><span>\"ReplSize\"<\/span><span>:&nbsp;<\/span><span>null<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span>}&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span>{&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span><span>\"IsMainCL\"<\/span><span>:&nbsp;<\/span><span>true<\/span><span>,&nbsp;<\/span><\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span><span>\"Name\"<\/span><span>:&nbsp;<\/span><span>\"test.main2\"<\/span><span>,&nbsp;<\/span><\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span><span>\"MainCLName\"<\/span><span>:&nbsp;<\/span><span>null<\/span><span>,&nbsp;<\/span><\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span><span>\"ReplSize\"<\/span><span>:&nbsp;<\/span><span>null<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span>}&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span>{&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span><span>\"Name\"<\/span><span>:&nbsp;<\/span><span>\"foo.tt\"<\/span><span>,&nbsp;<\/span><\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span><span>\"ReplSize\"<\/span><span>:&nbsp;3,&nbsp;<\/span><\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span><span>\"IsMainCL\"<\/span><span>:&nbsp;<\/span><span>null<\/span><span>,&nbsp;<\/span><\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span><span>\"MainCLName\"<\/span><span>:&nbsp;<\/span><span>null<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n   \n  \n  \n  <li><span>}&nbsp;<\/span><\/li>\n  \n \n \n <\/ol><\/pre>\n<p>&nbsp;<\/p>\n<p><strong>5. \u603b\u7ed3<\/strong><\/p>\n<p>\u5206\u5e03\u5f0f\u7684\u6570\u636e\u5e93\uff0c\u901a\u8fc7Raft\u7b97\u6cd5\u6765\u786e\u4fdd\u5728\u5206\u5e03\u5f0f\u60c5\u51b5\u4e0a\u6570\u636e\u7684\u4e00\u81f4\u6027\uff0c\u5e76\u4e14\u7f16\u76ee\u5206\u533a\u7ec4\u548c\u6570\u636e\u5206\u533a\u7ec4\u5bf9\u6570\u636e\u4e00\u81f4\u6027\u8981\u6c42\u53c8\u6709\u6240\u4e0d\u540c\uff0c\u7f16\u76ee\u5206\u533a\u7ec4\u59cb\u7ec8\u8981\u6c42\u7684\u662f\u6570\u636e\u5728\u591a\u526f\u672c\u8bf7\u60c5\u51b5\u4e0b\u6570\u636e\u5f3a\u4e00\u81f4\u6027\uff0c\u800c\u6570\u636e\u5206\u533a\u7ec4\u5219\u53ef\u4ee5\u7531\u7528\u6237\u5728\u521b\u5efa\u96c6\u5408\u65f6\u6765\u6267\u884c\u6570\u636e\u4e00\u81f4\u6027\u7684\u5f3a\u5ea6\uff0c\u5f3a\u5ea6\u8d8a\u9ad8\uff0c\u6570\u636e\u5b89\u5168\u6027\u8d8a\u597d\uff0c\u4f46\u662f\u6267\u884c\u7684\u6548\u7387\u5c31\u4f1a\u76f8\u5bf9\u8f83\u5dee\uff0c\u53cd\u4e4b\u4f9d\u7136\u3002<\/p>\n<p>\u76ee\u524dSequoiaDB\u5728\u6570\u636e\u4e00\u81f4\u6027\u573a\u666f\u4e0a\uff0c\u7528\u6237\u7684\u8c03\u6574\u7a7a\u95f4\u8f83\u5927\uff0c\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u7684\u4e1a\u52a1\u8981\u6c42\u6765\u8c03\u6574\u6570\u636e\u4e00\u81f4\u6027\u7684\u5f3a\u5ea6\uff0c\u4ee5\u6ee1\u8db3\u4e1a\u52a1\u6216\u8ffd\u6c42\u6027\u80fd***\uff0c\u6216\u8005\u6570\u636e\u6700\u5b89\u5168\u7684\u6280\u672f\u8981\u6c42\u3002&nbsp;<\/p>\n<p><span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u6570\u636e\u4e00\u81f4\u6027\u539f\u7406\u8bf4\u660e\u4e0e\u5b9e\u73b0 \u4f5c\u8005\uff1a\u4f5a\u540d 2017-10-19 18:37:57 \u6570\u636e\u5e93 \u5927\u6570\u636e \u5206\u5e03 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":239584,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[55],"tags":[],"class_list":["post-239583","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cloud-phone"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/239583","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=239583"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/239583\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media\/239584"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=239583"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=239583"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=239583"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}